moorjohn

Most recent activity

• BB shell too tight for sealed bearing

  @moorjohn started

  • 6 comments
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  @moorjohn replied
• BB shell too tight for sealed bearing

  in Mechanics & Fixin' • 14 years, 5 months

  

  That was what the guy at the lbs suggested: with just the axle inside the bb, there shouldn't be much problem with clearances. Slightly ironically, I'd already sprung for a Campag triple with a square taper axle; on the basis that the bb had been made long before outboard bearings had been thought of and I couldn't be sure they'd fit properly onto the shell...

• BB shell too tight for sealed bearing

  in Mechanics & Fixin' • 14 years, 5 months

  

  I dremel'd the tube. Bosch do some nice little grinding shapes which go in a normal electric drill.

  I made sure I had the frame firmly fixed, and had a support for the drill to rest on as I held it in my hands. This was because I was worried that the dremel would bounce around inside the bb shell and trash the threads.

  No such problem though. Took a few mins to take off 1-2mm where it was in the way.

  sealed bb is now in. cool.

  Thanks Fedster

• BB shell too tight for sealed bearing

  in Mechanics & Fixin' • 14 years, 5 months

  

  Hi Folks, my little problem is this,

  I have a late 80's steel frame, which I'm building up with mostly modern stuff. I've bought a nice campag triple chainset and sealed bb.

  Trouble is, the seat tube protrudes a little too far into the space of the bb shell. when you screw in the drive-side sealed bb, the shell of the bb touches the ends of the tube, and is pushed off-centre.

  Result, you can't screw in the bb more than about half a turn.

  I have a sealed bb in my other bike (slightly older) and it's no problem. Seems like this one was just made with the tolerances a bit tight.

  Nice lad at the bike shope chased out the threads, so it ain't that I know. And he tried a shimano bb with the same problem. So it seems like they are a standard diameter.

  Have sealed BBs got fatter since they first came out?
  Is there a make of BB which is recognised among the cognoscenti for its special slimness?
  Worst case scenario, can you still get hold of non-sealed bottom brackets (with campag axles)?

  Or am I better off trying to grind down the protruding tubes with a little dremel or similar - being careful to leave the threads intact. Hmm steel tubes; could be 1-2 mm I need - might be a big job.

  If there's anyone out there who's run into this I'd be v grateful for advice

  all the best

  Moojohn

• For Sale: 3TTT, SR, GB, Mavic, Shimano 600, Kasuki, Kalloy stems 25.4 and 26.0 clamp

  in Components and clothing • 14 years, 6 months

  

  pm sent on 30

• For Sale: 3TTT, SR, GB, Mavic, Shimano 600, Kasuki, Kalloy stems 25.4 and 26.0 clamp

  in Components and clothing • 14 years, 6 months

  

  Hi Hilary,

  dibs on 30
  (30) 11cm 1980s VG £14

• For Sale: Brake callipers and levers Shimano Campag Modolo Dia-Compe etc

  in Components and clothing • 14 years, 6 months

  

  Hi Hilary, dibs on the long reach 105 dual pivot allen key callipers £17 (13)

  pm sent

  thanks

  Moorjohn

• ?late 80's frame, brazeon fm: can I use a compact chainwheel?

  @moorjohn started

  • 3 comments
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  @yoav replied
• ?late 80's frame, brazeon fm: can I use a compact chainwheel?

  in Mechanics & Fixin' • 14 years, 7 months

  

  I've just got a late 80's frame.

  Want to put fairly modern kit on it, including compact crankset (or maybe triple)

  But it's a brazeon front mech.

  No worries with a band-on, because you can just slide it down a bit to get it nice and close to the big ring.

  But with this, I don't know if I'll have enough scope for adjustment; depends where the brazeon is and how big the slot is.

  don't really want to buy a compact crankset then not be able to use it...

  has anyone any experience of this?

  thanks a lot

  moorjohn

• For Sale: Colnago Master frameset

  in Complete bikes and frame & forks • 14 years, 7 months

  

  ...I will return; better, stronger, faster than before...

  ...certainly faster...